发布求助
文献互助 智能选刊 最新文献

2019 20th International Scientific Conference on Electric Power Engineering (EPE)最新文献

筛选
英文 中文
Change of Loss Factor On the Surface of Transformer Paper Due to Thermal Degradation 热降解对变压器纸表面损耗因子的影响
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778033
R. Cimbala, L. Kruželák, Maksym Oliinyk
{"title":"Change of Loss Factor On the Surface of Transformer Paper Due to Thermal Degradation","authors":"R. Cimbala, L. Kruželák, Maksym Oliinyk","doi":"10.1109/EPE.2019.8778033","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778033","url":null,"abstract":"This publication deals with changes in the loss factor on the surface of the impregnated transformer paper in the event of thermal degradation. The theoretical part discusses the properties of insulating materials used in the chosen experiment and a description of the impedance spectroscopy method in the frequency domain. The practical part contains experimental description, used transformer paper samples impregnated with different types of transformer oil and analysis of measured results with dependencies of loss factor, depending on frequency.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124195119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of Energy Consumption in the Residential Building with a Heat Pump 采用热泵的住宅建筑能耗评估
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778066
Jan Rimbala, J. Votava, J. Kynčl
{"title":"Assessment of Energy Consumption in the Residential Building with a Heat Pump","authors":"Jan Rimbala, J. Votava, J. Kynčl","doi":"10.1109/EPE.2019.8778066","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778066","url":null,"abstract":"This paper analyzes the accuracy of the calculation of the energy needed for the heating of residential buildings by heat pumps. The reference value is the consumption obtained from the actual time course of temperature and the heat loss calculated by solving the partial differential equations. This value is compared with the results obtained using average daily and monthly temperatures and using a static wall model without heat capacity. The calculations are performed for the Carnot heat pump and for the currently used WPL18 heat pump.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"132 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120863377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Physical Phenomena that Affect the Effectiveness of the Energy Transfer in Electrical Systems 影响电力系统能量传递有效性的物理现象
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8777983
L. Czarnecki
{"title":"Physical Phenomena that Affect the Effectiveness of the Energy Transfer in Electrical Systems","authors":"L. Czarnecki","doi":"10.1109/EPE.2019.8777983","DOIUrl":"https://doi.org/10.1109/EPE.2019.8777983","url":null,"abstract":"The effectiveness of the energy delivery from its producers to customers is affected by a number of physical phenomena, but the nature of these phenomena is unclear and debated over a century. This debate has resulted in a number of power theories and a great variety of definitions of different power quantities. All of them are mathematically correct but differ as to the interpretation of the physical phenomena which accompany the energy transfer and affect the effectiveness of this transfer. These definitions and physical interpretations affect the method of the power factor improvement and unfortunately, they can cause a compensator malfunction. Presently, the most advanced power theory is based on the Currents' Physical Components (CPC) concept. Results of this theory are used in this paper for a discussion on physical phenomena which affect the effectiveness of the energy transfer in electrical systems.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124086725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the Possibility of Active Residual Oscillation Suppression Using an Embedded System 利用嵌入式系统主动抑制剩余振荡的可能性分析
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778164
M. Paskala, J. Šedo, A. Kondelová, P. Sojka
{"title":"Analysis of the Possibility of Active Residual Oscillation Suppression Using an Embedded System","authors":"M. Paskala, J. Šedo, A. Kondelová, P. Sojka","doi":"10.1109/EPE.2019.8778164","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778164","url":null,"abstract":"The article deals with the issue of active damping of undesirable residual oscillations. The model of a planar physical pendulum with a prismatic joint was chosen as a suitable model example. The chosen model can be identified in practice as a crane arm with a movable carriage. At present, the most common solution for suppressing residual oscillations is to use signal shaping circuits. Their task is to ensure the acceleration and deceleration without producing undesirable oscillation. The article analyses the solution of residual oscillation suppression using an embedded system for cases where the unwanted oscillation of a load has already occurred. This system should ensure the measurement, evaluation and consequent targeted influencing of the main control loop. This is the introduction of an embedded system for active damping.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124671386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reducing the Impact of Transient Phenomena of Arc Furnace on Power Network Operation 减少电弧炉暂态现象对电网运行的影响
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778130
Dušan Medved’, Zsolt Čonka, M. Kolcun, M. Ivančák, Makm Oliinyk
{"title":"Reducing the Impact of Transient Phenomena of Arc Furnace on Power Network Operation","authors":"Dušan Medved’, Zsolt Čonka, M. Kolcun, M. Ivančák, Makm Oliinyk","doi":"10.1109/EPE.2019.8778130","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778130","url":null,"abstract":"This paper deals with the analysis of the transient phenomena caused by the operation of the electric arc furnace in the 22 kV network, describes the causes of their origin and proposes the possibilities of their reduction with regard to the fulfillment of the quality of electric energy. In particular, it focuses on assessing the short-term flicker rate and the use of the STATCOM device to reduce it. The analysis and subsequent reducing of transient phenomena impact was realized by simulations using the Matlab / Simscape Power Systems tool. The obtained results were evaluated in accordance with the valid European standards and legislation of the Slovak Republic.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130029691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Reliability of the photovoltaic systems 光伏系统的可靠性
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778038
Petr Seroiszka, Z. Hradílek
{"title":"Reliability of the photovoltaic systems","authors":"Petr Seroiszka, Z. Hradílek","doi":"10.1109/EPE.2019.8778038","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778038","url":null,"abstract":"This paper deals with the reliability of the PV system's connection to the distribution network. The first part defines the conditions for the PV system's connection to the distribution network, while the second part defines the factors influencing the reliability of the PV system's operation and connection to the distribution network. The paper contains production data describing the failure and subsequent analysis of the failure of central inverters of the PV system. In the conclusion there are recommendations for the use of methods to analyse faults and to determine system reliability.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131937617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of the Angle Between Two Power Systems on Electromagnetic Fields of Overhead Double Circuit Power Line 两电力系统夹角对架空双回线电磁场的影响
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778124
J. Bendík, M. Cenký, Ž. Eleschová, A. Beláň, B. Cintula, P. Janiga
{"title":"Influence of the Angle Between Two Power Systems on Electromagnetic Fields of Overhead Double Circuit Power Line","authors":"J. Bendík, M. Cenký, Ž. Eleschová, A. Beláň, B. Cintula, P. Janiga","doi":"10.1109/EPE.2019.8778124","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778124","url":null,"abstract":"The issue of electromagnetic fields of overhead power lines is still nowadays widely discussed. There are two basic topics in this research field. The first one is the exposure to the fields and their influence on human health. Due to this plausible health risk many counties have established exposure limits for the public and workers. The second topic is technological. With new technologies and the era of digitalization and modern electronics there are new plausibilities how to use the complex information that electromagnetic field can provide us with. Electromagnetic field can give us information about voltage and current events in the power system. It is also important to quantify the fields and their interference with the surrounding infrastructure, like pipe lines, telecommunication lines ect. Both of this main fields relay on precise measurement or on exact calculation. The article deals with the effect of the difference in the angle of the two power system of the double circuit overhead power line on the value of intensity of electric field and magnetic flux density. It has been shown that the widely used simplification that calculates the field only as a result of parallel operation of two power systems on double circuit power line can be misleading in specific situations.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130472120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Analytical Model for the Electrodynamical Forces inside Electrical Contacts of Commutation Devices 换相装置电触点内电动力的解析模型
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778079
A. Popescu, Emil Lazarescu, F. Frigura-Iliasa, L. Dolga, H. Filipescu, Anghel Andreea
{"title":"Analytical Model for the Electrodynamical Forces inside Electrical Contacts of Commutation Devices","authors":"A. Popescu, Emil Lazarescu, F. Frigura-Iliasa, L. Dolga, H. Filipescu, Anghel Andreea","doi":"10.1109/EPE.2019.8778079","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778079","url":null,"abstract":"This paper aims to present a new analytical model for the contact area of all switching devices, at all voltage and current levels. It was proposed in order to recalculate all the computational formulas related to the electrodynamical forces which inevitably appear in a mostly symmetric contact, with a different shape, other than a sharpen or pointed one. When applying this model, the very simplifying hypothesis of the constant current density on equipotential stiction surfaces for the crossing current is completely abandoned. These new expressions could experimentally be verified by means of a simple device. By using this model, we can study the “attraction”, electrodynamical forces that may appear in an electrical contact belonging to any switching device used in electrical and power engineering technique. This research could improve both design and maintenance of new and existing switching equipment like contactors, low voltage switches, oil submersed switches or even SF6high voltage ones.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126659340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Error Ratio Evaluation of Protection Core of Selected Older Distribution Current Transformers 部分老式配电电流互感器保护铁芯误差率评估
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8777940
David Lazecký, V. Král, S. Rusek, Zdenek Hytka
{"title":"Error Ratio Evaluation of Protection Core of Selected Older Distribution Current Transformers","authors":"David Lazecký, V. Král, S. Rusek, Zdenek Hytka","doi":"10.1109/EPE.2019.8777940","DOIUrl":"https://doi.org/10.1109/EPE.2019.8777940","url":null,"abstract":"Current transformer (CT) is one of the vital devices for metering electrical parameters of distribution and transmission networks. Requirements and specification are described in technical standards for 60 years at least, but ageing and performance after some time of on-site operation have not been described in recent works well, especially in conditions similar to network and climate situation in the Czech Republic. Due to the intended aim of using output values for technical state estimation of network components in RCM strategy development, only protection cores measurement for error ratio evaluation was proposed. The results of two selected older oil-insulated current transformers (5P10 class) from distribution network are presented in the paper. The cores are measured according to the protection CT accuracy class, and also, matching measuring CT accuracy class for a general overview of CT accuracy only. The equipment used for measurement is described. The highest current recordings, ratio error evaluation and values are presented and depicted. Results applicability is discussed.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114180329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Modelling of Cogeneration Units 热电联产机组建模
2019 20th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2019-05-01 DOI: 10.1109/EPE.2019.8778103
M. Špaček, Z. Hradílek
{"title":"Modelling of Cogeneration Units","authors":"M. Špaček, Z. Hradílek","doi":"10.1109/EPE.2019.8778103","DOIUrl":"https://doi.org/10.1109/EPE.2019.8778103","url":null,"abstract":"This paper deals with the modeling of cogeneration units. This model is programmed in Microsoft Excel. The input parameters are different, according to the required calculation requirements. The program can design a cogeneration unit for the specified mode of operation. It can also count on the economic side of the cogeneration unit's operation, which may include revenue in individual years, operating costs, green bonuses, cash flow, return on investment and other economic requirements.","PeriodicalId":117212,"journal":{"name":"2019 20th International Scientific Conference on Electric Power Engineering (EPE)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115873340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信